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This is a First-principles calculations study.

September 10, 2025Physical Review LettersOpen Access

Intrinsic Dynamic Generation of Spin Polarization by Time-Varying Electric Field

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Proposed mechanism generates spin polarization in nonmagnetic insulators, suggesting novel applications in spintronics.

Dynamic spin generation occurs due to time-varying electric fields rather than static fields, enhancing spintronic mechanisms.
Key phenomena include linear spin generation in nonmagnetic insulators and intrinsic Néel spin-orbit torque in antiferromagnetic materials.
First-principles calculations predict significant effects driven by terahertz fields in materials like monolayer Bi and MnBi2Te4.
This intrinsic effect could lead to low-consumption and ultrafast devices, indicating a breakthrough in spintronics.

Feng et al. (2025) studied this question.

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